Question
$\mathrm{CO}_2$ and $\mathrm{SO}_2$ both are triatomic molecules but there is a big difference in their dipole moment, why?
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Answer
Is linear and bond moments are equal and opposite, therefore, net dipole moment is zero, dipoles get cancelled.
$\mathrm{SO}_2$ is bent molecule, it has net dipole moment because dipole do not get cancelled.
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